[Phssthpok]

For some reason images that look perfectly fine on other devices are about half the expected size on my Kobo. I have an image which is 800px wide, the CSS says "height: auto; max-width: 100%" and it takes up about 1/3 of the screen width. Even with a 1200-ish pixel screen width it should be about 2/3 of the width, not 1/3.

Changing the CSS to "width: 150%" instead of "max-width: 100%" gives me an image which is still only about 70% of the screen width. Why should specifying 150% of the available width (~1800px) result in something which is far less than the available width? What on earth is going on, and is there any way to fix this short of editing all my books which contain images (several hundred at least, maybe thousands) and adding media-specific CSS to each one?